noun
1. : residual pressure on the exhaust side of a steam-engine piston against which the steam on the intake side must work
2. : opposition to flow of a liquid or gas due to friction, inertia, gravity, or other cause
noun
1. : residual pressure on the exhaust side of a steam-engine piston against which the steam on the intake side must work
2. : opposition to flow of a liquid or gas due to friction, inertia, gravity, or other cause
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012